LT3094
−20V, 500mA, Ultralow Noise, Ultrahigh PSRR Negative Linear Regulator
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Overview
Features and Benefits
- Ultralow RMS Noise: 0.8µVRMS (10Hz to 100kHz)
- Ultralow Spot Noise: 2.2nV/√Hz at 10kHz
- Ultrahigh PSRR: 74dB at 1MHz
- Output Current: 500mA
- Wide Input Voltage Range: –1.8V to –20V
- Single Capacitor Improves Noise and PSRR
- 100µA SET Pin Current: ±1% Initial Accuracy
- Single Resistor Programs Output Voltage
- Programmable Current Limit
- Low Dropout Voltage: 235mV
- Output Voltage Range: 0V to –19.5V
- Programmable Power Good and Fast Start-Up
- Bipolar Precision Enable/UVLO Pin
- VIOC Pin Controls Upstream Regulator to Minimize Power Dissipation and Optimize PSRR
- Minimum Output Capacitor: 10µF Ceramic
- 12-Lead MSOP and 3mm × 3mm DFN Packages
Product Details
The LT3094 is a high performance low dropout negative linear regulator featuring ADI’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applications. The device can be easily paralleled to further reduce noise, increase output current and spread heat on a PCB.
The LT3094 supplies 500mA at a typical 235mV dropout voltage. Operating quiescent current is nominally 2.35mA and drops to 3µA in shutdown. The device’s wide output voltage range (0V to –19.5V) error amplifier operates in unity-gain and provides virtually constant output noise, PSRR, bandwidth, and load regulation independent of the programmed output voltage. Additional features are a bipolar enable pin, programmable current limit, fast startup capability and programmable power good to indicate output voltage regulation. The regulator incorporates a tracking function to control an upstream supply to maintain a constant voltage across the LT3094 to minimize power dissipation and optimize PSRR.
The LT3094 is stable with a minimum 10µF ceramic output capacitor. Built-in protection includes internal current limit with foldback and thermal limit with hysteresis. The LT3094 is available in thermally enhanced 12-Lead MSOP and 3mm × 3mm DFN Packages.
Applications
- RF and Precision Power Supplies
- Very Low Noise Instrumentation
- High Speed/High Precision Data Converters
- Medical Applications: Diagnostics and Imaging
- Post-Regulator for Switching Supplies
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Documentation & Resources
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R531 Reliability Data3/26/2018PDF23 K
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SCP-LT3094-EVALZ - Demo Manual (Rev. 0)2/1/2021PDF1M
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Linear Low Dropout (LDO) Regulator Solutions4/17/2018PDF3 M
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Current Noise in FET Input Amps2/1/2020
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
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Models for the following parts are available in LTspice:
LT3094
Reference Designs (2)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
PCN-PDN Information
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Support & Discussions
LT3094 Discussions
RE: Power Supply Circuit for 16x16 array with 64 ADAR1000 beamformers
5 week(s) ago in RF and Microwave
Sample & Buy
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.